1984–85 Sussex County Football League

The 1984–85 Sussex County Football League season was the 60th in the history of Sussex County Football League a football competition in England.

Division One
Division One featured 14 clubs which competed in the division last season, along with two new clubs, promoted from Division Two:
 * Arundel
 * Portfield

Division Two
Division Two featured 13 clubs which competed in the division last season, along with three new clubs:
 * Ferring, promoted from Division Three
 * Franklands Village, promoted from Division Three
 * Pagham, relegated from Division One

Division Three
Division Three featured ten clubs which competed in the division last season, along with five new clubs:
 * Cooksbridge
 * Crowborough Athletic, relegated from Division Two
 * Ifield
 * Oakwood, joined from the Southern Counties Combination League
 * Saltdean United